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WO1988000620A2 - Produit d'addition rapidement soluble pour bains de fusion - Google Patents

Produit d'addition rapidement soluble pour bains de fusion Download PDF

Info

Publication number
WO1988000620A2
WO1988000620A2 PCT/EP1987/000387 EP8700387W WO8800620A2 WO 1988000620 A2 WO1988000620 A2 WO 1988000620A2 EP 8700387 W EP8700387 W EP 8700387W WO 8800620 A2 WO8800620 A2 WO 8800620A2
Authority
WO
WIPO (PCT)
Prior art keywords
component
aluminum fluoride
agent according
fluoride
metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP1987/000387
Other languages
German (de)
English (en)
Other versions
WO1988000620A3 (fr
Inventor
Hartmut MEYER-GRÜNOW
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Evonik Operations GmbH
Original Assignee
SKW Trostberg AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SKW Trostberg AG filed Critical SKW Trostberg AG
Priority to DE8787904865T priority Critical patent/DE3767698D1/de
Publication of WO1988000620A2 publication Critical patent/WO1988000620A2/fr
Publication of WO1988000620A3 publication Critical patent/WO1988000620A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C22C1/026—Alloys based on aluminium

Definitions

  • the present invention relates to a snow-soluble additive for molten metals for introducing alloying elements into metals.
  • the alloying elements are usually added to the liquid metal bath in solid form.
  • Aluminum is alloyed e.g. B. with magnesium to achieve better strengths, with silicon to improve the castability and strength, with manganese and chromium to increase the strength and corrosion resistance.
  • a whole series of other alloying elements are known for specifically influencing the alloy properties.
  • the alloy metals in the form of master alloys which have a higher melting point than the base metal, have previously been added in order to achieve rapid dissolution.
  • the disadvantage of these master alloys is their limited content of alloy metal.
  • the standard alloys for aluminum alloy only contain a maximum of 20% silicon, up to 20% chromium or up to 50% Mn in addition to aluminum.
  • the present invention was therefore based on the object of developing an additive for molten metals which does not have the disadvantages of the prior art mentioned, but also enables complete and rapid dissolution in the liquid base metal even with a higher concentration of alloy metal.
  • the additive consists of 2 to 50% by weight of a component A consisting of alkali aluminum fluoride and / or a salt containing alkali aluminum fluoride and 50 to 98% by weight of a component B consisting of contains one or more alloy metal (s) and that components A and B are intimately mixed.
  • a component A consisting of alkali aluminum fluoride and / or a salt containing alkali aluminum fluoride
  • a component B consisting of contains one or more alloy metal (s) and that components A and B are intimately mixed.
  • the snow-soluble metal melt additive according to the present invention consists of 2 to 50 wt. % of component A and 50-98% by weight of component B.
  • Alkali-aluminum fluoride and / or a salt containing alkali-aluminum fluoride can be used as component A, provided that unacceptable amounts of impurity are thereby introduced into the base metal when the additive according to the invention is used.
  • the melting point of the salt or salt mixture should not be higher than that of the base metal.
  • alkali aluminum fluoride a mixture of alkali and aluminum fluoride can also be used.
  • Salts containing alkali aluminum fluoride are to be understood as meaning such mixtures of alkali aluminum fluoride and other salts, in particular fluoride and / or chloride salts, in which the proportion of alkali aluminum fluoride is at least 50% by weight.
  • alkali compounds in principle all alkali metal salts of aluminum fluoride can be used, but the sodium and / or potassium salts are to be regarded as preferred.
  • component A in the additive should be as low as possible with good dissolving properties of the alloy component (s). Depending on the density of the alloy metal, 2% by weight of component A is sufficient. The best combination of optimal dissolution rate and maximum concentration of the alloy component in the additive is achieved in the range from 5 to 25% by weight of component A.
  • Component B which is contained in the additive in a proportion of 50 to 98% by weight, in particular 75 to 95% by weight, consists of one or more alloy metal (s).
  • alloy metal s
  • all alloying elements can be used here, with chromium, manganese and iron being preferred due to their technical importance. It can but other alloying elements such as Ni, Co, Cu, Ag, Ti, Zr, Hf, V, Nb, Ta, Mo and W can also be contained in the additive.
  • the alloy metal does not have to be in pure form, but alloys or mixtures of several metals can also be used, provided that this does not cause any undesirable impurities in the base metal.
  • both component A and component B are in intimately mixed form, which were prepared by mixing the powders.
  • the additive can be used in the form of briquettes, tablets or pellets or the like, the size of these grains being able to be varied within wide limits. It is only essential that the bodies have a sufficiently high sinking rate in the metal bath in question and that they do not too thick to ensure an acceptable dissolution rate.
  • the maximum thickness of the body can be assumed to be 50 mm, while the preferred range is between 5 and 25 mm.
  • the additive can also be in the form of a filled wire, the agent being encased in a suitable material.
  • care must be taken to ensure that it quickly dissolves in the melt in order to release the additive and that it does not introduce any undesirable impurities into the metal bath to be alloyed. It has proven to be particularly advantageous to use the respective base metal.
  • the additive is produced by intimate
  • prior comminution is necessary, which, if necessary, may consist of grinding in the usual mills such as ball, vibrating or impact mills.
  • the additive according to the invention is added in an amount of 0.01 to 25% by weight to the liquid base metal for alloying, whereby it dissolves completely and without residue formation in it and forms a homogeneous alloy.
  • all metals or alloys in which the elements introduced by the additive according to the invention can be tolerated can be used as base metal.
  • Light metal alloys such as pure aluminum or aluminum alloys as well as pure magnesium or magnesium alloys have proven to be particularly suitable, for which the advantages such as high dissolution rate and high concentration of alloy component were particularly evident.
  • Chromium powder ⁇ 150 ⁇ m, potassium aluminum fluoride powder (KAIF 4 ) ⁇ 150 ⁇ m and aluminum powder with a grain size of 430 - 75 ⁇ m were used for the mixture compacts.
  • the intimate mixture was compressed in a tablet press to approx. 70 - 80% of the theoretical density.
  • two state-of-the-art commercial products were used.
  • Table 1 shows the mixtures used, the density of the compacts and their solubility behavior.
  • Experiments 1 to 4 in which the additives according to the invention were used, show the dissolution rate as a function of the potassium aluminum fluoride content of the mixtures.
  • the experiments show with a potassium aluminum fluoride content of 14.1% by weight (cf. experiment 4), the chromium completely dissolved after two minutes.
  • the chromium is completely dissolved in the base metal after only ten minutes (cf. Experiment 2).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Powder Metallurgy (AREA)

Abstract

Un produit d'addition rapidement soluble pour bains de fusion contient entre 2 et 50 % en poids d'un composant A composé de fluorure alcalin d'aluminium ou d'un sel contenant du fluorure alcalin d'aluminium et un composant B composé d'un ou plusieurs métaux d'alliage, les composants A et B étant intimement mélangés. Ce produit d'addition a une vitesse de dissolution élevée, même avec une teneur élevée en métal d'alliage, tout en permettant d'obtenir un rendement total du métal d'alliage.
PCT/EP1987/000387 1986-07-16 1987-07-16 Produit d'addition rapidement soluble pour bains de fusion Ceased WO1988000620A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8787904865T DE3767698D1 (de) 1986-07-16 1987-07-16 Schnelloesliches zusatzmittel fuer aluminiumschmelzen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3624005A DE3624005A1 (de) 1986-07-16 1986-07-16 Schnelloesliches zusatzmittel fuer metallschmelzen
DEP3624005.2 1986-07-16

Publications (2)

Publication Number Publication Date
WO1988000620A2 true WO1988000620A2 (fr) 1988-01-28
WO1988000620A3 WO1988000620A3 (fr) 1988-03-10

Family

ID=6305292

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1987/000387 Ceased WO1988000620A2 (fr) 1986-07-16 1987-07-16 Produit d'addition rapidement soluble pour bains de fusion

Country Status (5)

Country Link
US (1) US4880462A (fr)
EP (1) EP0275289B1 (fr)
JP (1) JPH01500527A (fr)
DE (2) DE3624005A1 (fr)
WO (1) WO1988000620A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0423912A1 (fr) * 1989-10-16 1991-04-24 Nikkin Flux Inc. Procédé pour l'addition de silicium à aluminium

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU5148596A (en) * 1995-03-31 1996-10-16 Merck Patent Gmbh Tib2 particulate ceramic reinforced al-alloy metal-matrix co mposites
ES2140300B1 (es) * 1997-05-09 2000-10-16 Bostlan Sa Aditivo para la introduccion de uno o mas metales en las aleaciones de aluminio.
US20050120829A1 (en) * 2002-03-27 2005-06-09 Guerrenabarrena Rafael S.P. Method for the production of high-concentration manganese mini-tablets for alloying aluminum baths and device for implementing said method
US7700038B2 (en) * 2005-03-21 2010-04-20 Ati Properties, Inc. Formed articles including master alloy, and methods of making and using the same
US8828117B2 (en) 2010-07-29 2014-09-09 Gregory L. Dressel Composition and process for improved efficiency in steel making
KR20160144406A (ko) 2014-04-04 2016-12-16 코닝 인코포레이티드 향상된 접착을 위한 유리 표면의 처리
CA3031491C (fr) * 2019-01-03 2020-03-24 2498890 Ontario Inc. Systemes, methodes et fils fourres pour traiter un metal fondu

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3591369A (en) * 1969-03-17 1971-07-06 Foote Mineral Co Method of adding manganese to aluminum
US3865584A (en) * 1971-07-12 1975-02-11 Foote Mineral Co Articles for adding manganese to aluminum
US3793007A (en) * 1971-07-12 1974-02-19 Foote Mineral Co Manganese compositions
US3865583A (en) * 1971-07-12 1975-02-11 Foote Mineral Co Method of adding manganese to aluminum
JPS4884011A (fr) * 1972-02-02 1973-11-08
US3935004A (en) * 1973-09-20 1976-01-27 Diamond Shamrock Corporation Addition of alloying constituents to aluminum
US3941588A (en) * 1974-02-11 1976-03-02 Foote Mineral Company Compositions for alloying metal
NL158330B (nl) * 1975-02-13 1978-10-16 Coq Bv Geheel gesloten eenfase schakeldveld voor hoge spanning.
DE2511351A1 (de) * 1975-03-14 1976-09-23 Diamond Shamrock Corp Legierungszusaetze und verfahren zum legieren von aluminium
FR2312570A1 (fr) * 1975-05-28 1976-12-24 Servimetal Pastilles composites facilitant l'addition d'elements d'alliages dans l'aluminium et les alliages legers
GB2112020B (en) * 1981-12-23 1985-07-03 London And Scandinavian Metall Introducing one or more metals into a melt comprising aluminium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0423912A1 (fr) * 1989-10-16 1991-04-24 Nikkin Flux Inc. Procédé pour l'addition de silicium à aluminium

Also Published As

Publication number Publication date
JPH01500527A (ja) 1989-02-23
EP0275289A1 (fr) 1988-07-27
DE3767698D1 (de) 1991-02-28
US4880462A (en) 1989-11-14
EP0275289B1 (fr) 1991-01-23
WO1988000620A3 (fr) 1988-03-10
DE3624005A1 (de) 1988-01-28

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